Software developer Citrix Systems ( CTXS) raised its fourth-quarter earnings outlook Monday, but said that "continuing uncertainty" in information-technology spending persists.

The shares were trading up $1.17, or 10.2%, at $12.60 in after-hours trading on Instinet. Citrix is up more than 145% since hitting a 52-week low of $4.70 back on July 9 of this year.

The Fort Lauderdale, Fla.-based company said it expects to post a net profit of 12 cents to 17 cents a share, excluding the amortization of goodwill related to acquisitions. Wall Street analysts were expecting the company to earn 12 cents a share, according to a poll conducted by Thomson Financial/First Call. Total revenue for the quarter ended Dec. 31 is targeted between $120 million and $130 million, ahead of the consensus estimate of $118.1 million.

The company's president and chief executive officer, Mark Templeton, is scheduled to make a presentation at the CSFB Technology Conference in Scottsdale, Arizona Wednesday afternoon. Other top-level executives will be making presentations at conferences in Europe between Dec. 3 and Dec. 5.